Cutting tool

ABSTRACT

A cutting tool including an annular cutter body having at least one V-shaped pocket formed therein and a cutting tool cartridge configured to be received in the at least one pocket of the cutter body. The cutting tool cartridge including a main body. The main body includes a cutting head having a cutting chip control portion and a pocket configured to receive a cutting insert.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation patent application of U.S. patentapplication Ser. No. 13/913,802 filed on Jun. 10, 2013. The entiredisclosure of the above patent application is incorporated herein byreference.

FIELD OF THE INVENTION

The present invention relates generally to a cutting tool and, moreparticularly, to a cutting tool including a cutter body having aplurality of cutting tool cartridges coupled thereto.

BACKGROUND OF THE INVENTION

Conventional cutting tools include an annular cutter body having one ormore circumferentially spaced recesses known as “pockets” formedtherein. Each of the pockets is configured to receive a cutting toolcartridge therein. The cutting tool cartridge has a shape andconfiguration to be secured within the pocket of the cutter body.Typically, the cutting tool cartridges are secured into the respectivepocket by means of a clamping screw, which extends through a hole in thecutting tool cartridge. The cutting tool cartridge is configured forretention of a cutting insert for removing material from a workpiece.

Presently, each of the cutting tool cartridges is configured forretention of a specific cutting insert having a certain depth of cut.Accordingly, the prior art cutting tools require numerous cutting toolcartridges when various depths of cut are desired. Furthermore, theprior art cutting tool cartridges do not positively locate the cuttinginsert. Thus, the position of the cutting insert is not controllableduring a brazing of the cutting insert to the cutting tool cartridge,resulting in misalignment of the cutting insert and an undesirablemachining of the workpiece.

Accordingly, it would be desirable to produce a cutting tool including acutter body provided with a plurality of cartridges, wherein each of thecartridges is economical to manufacture, easy to machine, and includes auniversal pocket which is capable of retaining a variety of cuttinginserts having differing depths of cut, as well as militates againstwear and damage to the cutter body.

SUMMARY OF THE INVENTION

In concordance and agreement with the present disclosure, a cutting toolincluding a cutter body provided with a plurality of cartridges, whereineach of the cartridges is economical to manufacture, easy to machine,and includes a universal pocket which is capable of retaining a varietyof cutting inserts having differing depths of cut, as well as militatesagainst wear and damage to the cutter body, has surprisingly beendiscovered.

In one embodiment, the cutting tool cartridge, comprises: a main bodyincluding a cutting head having a pocket configured to receive a cuttinginsert, wherein the pocket includes a shoulder and a recess formedbetween the shoulder and a substantially planar surface to position thecutting insert relative to the cutting tool cartridge.

In another embodiment, the cutting tool, comprises: a cutter bodyincluding at least one pocket formed therein; and a cutting toolcartridge configured to be received in the at least one pocket of thecutter body, the cutting tool cartridge including a main body, whereinthe main body includes a cutting head having a pocket configured toreceive a cutting insert, wherein the pocket includes a shoulder and arecess formed between the shoulder and a substantially planar surface toposition the cutting insert relative to the cutting tool cartridge.

In yet a further embodiment, the cutting tool, comprises: a cutter bodyincluding at least one pocket formed therein; and a cutting toolcartridge configured to be received in the at least one pocket of thecutter body, the cutting tool cartridge including a main body, whereinthe main body includes a cutting head having a cutting chip controlportion and a pocket configured to receive a cutting insert.

BRIEF DESCRIPTION OF THE DRAWINGS

The above, as well as other objects and advantages of the invention,will become readily apparent to those skilled in the art from a readingof the following detailed description of the invention when consideredin the light of the accompanying drawings in which:

FIG. 1 is a front perspective view of a portion of a cutting toolincluding a cutter body provided with a plurality of cartridgesaccording to the present invention, showing one of the cartridgesexploded from the cutter body;

FIG. 2 is a front perspective view of the cartridge illustrated in FIG.1 according to an embodiment of the invention, showing a cutting insertexploded from the cartridge; and

FIG. 3 is a front elevational view of the cartridge illustrated in FIGS.1 and 2.

DETAILED DESCRIPTION OF THE INVENTION

The following detailed description and appended drawings describe andillustrate various exemplary embodiments of the invention. Thedescription and drawings serve to enable one skilled in the art to makeand use the invention, and are not intended to limit the scope of theinvention in any manner.

FIG. 1 shows a cutting tool 10 according to the present invention. Thecutting tool 10 includes an annular cutter body 12 and one or morecircumferentially spaced recesses known as “pockets” 14 formed therein.Each of the pockets 14 is configured to receive a cartridge 16 therein.A longitudinal axis of each of the pockets 14 is substantially parallelwith a central, longitudinal axis of the cutter body 12. The pockets 14shown are equidistantly spaced at about thirty-six degrees with respectto each other and proximate a cutting end 18 of the cutter body 12. Itis understood, however, that the pockets 14 can be spaced with respectto each other at any desired interval and formed at any suitablelocation on the cutting end 18 of the cutter body 12. Each of thepockets 14 is generally V-shaped having side walls 20, 22 angledrelative to one another, a back wall 24 perpendicular to the side walls20, 22 and the longitudinal axis of the pockets 14, and a clearanceportion 26 formed at a nadir of the pocket 14. The V-shaped pockets 14permit the cartridges 16 received therein to be both right handed andleft handed.

In certain embodiments, each of the cartridges 16 is substantiallyidentical to the other cartridges 16. It is understood that any of thecartridges 16 can differ from the other cartridges 16 if desired. Asillustrated, the cartridge 16 has a main body 30. The main body 30 has agenerally triangular cross-sectional shape which permits the cartridge16 to firmly seat and align within the respective one of the pockets 14.Each cartridge 16 is mounted to the respective one of the pockets 14 byone or more fasteners 32 shown in FIG. 1. The fastener 32 may be of thetype having a head adapted to receive an alien wrench, for example. Athreaded shank of the fastener 32 is received through an aperture 33formed in the cartridge 16 and into an internally threaded bore 34formed in the cutter body 12, which extends radially inwardly from eachof the V-shaped pockets 14. In certain embodiments, each of thecartridges 16 may include a rod (not shown) extending laterallyoutwardly from the main body 30. The rod is configured to be received inan aperture (not shown) formed in the back wall 24 of the pocket 14 tofurther secure the cartridge 16 to the cutter body 12.

Referring now to FIGS. 2-3, one of the cartridges 16 according to thepresent invention is shown. The cartridge 16 includes a cutting head 36having a cutting chip control portion 38 and a universal pocket 40. Thecutting chip control portion 38 has a generally arcuate shape to directabrasive cutting chips away from the cutter body 12 and militate againsta flow of the abrasive cutting chips over the cutter body 12 during useof the cutting tool 10. As such, the cutting chip control portion 38 ofthe cutting head 36 minimizes wear and damage to the cutter body 12,thereby increasing a life of the cutting tool 10.

The universal pocket 40 of the cutting head 36 is configured to receivea cutting insert 42. In certain embodiments, the cutting insert 42 issecured to the cutting head 36 by brazing, for example. Various othermeans can be employed to couple the cutting insert 42 to the cuttinghead 36 as desired. The universal pocket 40 is formed in the cuttinghead 36 to positively locate the cutting insert 42 relative to thecartridge 16. As such, a position of the cutting insert 42 relative tothe cartridge 16 is controlled during the brazing process to militateagainst misalignment thereof. The universal pocket 40 is also configuredto retain a variety of cutting inserts 42 having different lengths.Therefore, the universal pocket 40 permits the cartridge 16 to beemployed for various depths of cut.

In certain embodiments, the universal pocket 40 is defined by a shoulderformed by a substantially planar first surface 46 and a substantiallyplanar second surface 48, a clearance recess 50, and a substantiallyplanar third surface 52. As shown, the first surface 46 faces towardsthe cutting chip control portion 38 of the cutting head 36 and extendssubstantially parallel to the longitudinal axis thereof. The secondsurface 48 is substantially perpendicular to the first surface 46 andextends substantially parallel to the longitudinal axis of the cuttinghead 36. The clearance recess 50 is formed between the shoulder and thesubstantially planar third surface 52 to permit the cutting insert 42 tobe positioned relative to the cartridge 16. The recess 50 extendssubstantially parallel to the longitudinal axis of the cutting head 36.As illustrated in FIG. 2, a portion 54 of the second surface 48 and therecess 50 is angled with respect to the longitudinal axis of the cuttinghead 36 and the first surface 46 towards a first cutting end 56 of thecutter body 12.

As more clearly shown in FIG. 2, the cutting insert 42 is configured tobe received in the universal pocket 40. In certain embodiments, thecutting insert 42 is formed of a polycrystalline diamond material. Forexample, the cutting insert 42 may be formed of a polycrystallinediamond composite material backed with cemented tungsten carbide bysintering together selected synthetic diamond particles at hightemperature and pressure in the presence of a solvent/catalyst metal. Asshown, the cutting insert 42 includes a first end 60 and a second end62. The first end 60 includes a substantially planar surface (not shown)and the second end 62 includes a nose radius 66, a substantially planarwiper surface 68, and a substantially planar relief surface 70. Incertain embodiments, the nose radius 66 is in a range of about 0.005 mmto about 3.0 mm and the wiper surface 68 is in a range of about 0.0 mmto about 0.15 mm. A substantially planar outer surface 72 extendsbetween the first end 60 and the second end 62. It is understood that alength of the outer surface 72, also known as a depth of cut (DOC), canbe any suitable length as desired. In certain embodiments, the length ofthe outer surface 72 or DOC is in a range of about 0.200 mm to about0.75 mm. A substantially planar first inner surface 74 and asubstantially planar second inner surface 76 extend between the firstend 60 and the second end 62. The second inner surface 76 is angled withrespect to the longitudinal axis of the cutting head 36 to cooperatewith the portion 54 of the first surface 46 of the cutting head 36. Aclearance recess 78 is formed between the first inner surface 74 and thesecond inner surface 76 to permit the cutting insert 42 to be receivedin the universal pocket 40. It is understood that the cutting insert 42can have any suitable dimensions as desired.

From the foregoing description, one ordinarily skilled in the art caneasily ascertain the essential characteristics of this invention and,without departing from the spirit and scope thereof, can make variouschanges and modifications to the invention to adapt it to various usagesand conditions.

What is claimed is:
 1. A cutting tool cartridge configured to bereceived in an annular cutter body rotatable about a centrallongitudinal axis thereof, the cutting tool cartridge comprising: a mainbody including a cutting head having a pocket configured to receive acutting insert, wherein the pocket includes a shoulder and asubstantially planar surface, the shoulder and the substantially planarsurface cooperating to position the cutting insert relative to thecutting tool cartridge, wherein a concave surface extends away from theshoulder of the pocket, the concave surface including a first endadjacent the shoulder and a second end spaced from the shoulder, whereinthe second end of the concave surface is disposed adjacent an outercircumferential surface of the annular cutter body when the cutting toolcartridge is received in the annular cutter body, wherein the second endof the concave surface is disposed radially outward of the first end ofthe concave surface with respect to the central longitudinal axis of theannular cutter body when the cutting tool cartridge is received in theannular cutter body, and wherein the concave surface is configured todirect cutting chips away from the annular cutter body.
 2. The cuttingtool cartridge of claim 1, wherein the shoulder extends longitudinallyin a direction substantially parallel to a longitudinal axis of the mainbody.
 3. The cutting tool cartridge of claim 1, wherein thesubstantially planar surface of the pocket extends longitudinally in adirection substantially parallel to the central longitudinal axis of theannular cutter body.
 4. The cutting tool cartridge of claim 3, whereinthe shoulder includes a substantially planar first surface arrangedperpendicular to a substantially planar second surface, and thesubstantially planar surface of the pocket is arranged substantiallyperpendicular to the second surface of the shoulder and substantiallyparallel to the first surface of the shoulder.
 5. The cutting toolcartridge of claim 4, wherein a clearance recess is formed at a junctionof the substantially planar surface of the pocket and the second surfaceof the shoulder.
 6. The cutting tool cartridge of claim 5, wherein theclearance recess has a substantially triangular cross-sectional shape.7. A cutting tool cartridge, comprising: a main body including a cuttinghead having a pocket configured to receive a cutting insert, wherein thepocket includes a shoulder and a substantially planar surface, theshoulder and the substantially planar surface cooperating to positionthe cutting insert relative to the cutting tool cartridge, the shoulderincluding a first surface and a second surface, the second surfaceincluding a first portion arranged substantially perpendicular to thefirst surface and a second portion angled with respect to the firstportion.
 8. The cutting tool cartridge of claim 7, wherein the cuttinginsert includes an inner surface having a shape substantiallycorresponding to a shape of the second surface of the shoulder.
 9. Thecutting tool cartridge of claim 8, wherein the inner surface of thecutting insert includes a substantially planar first inner surface and asubstantially planar second inner surface angled with respect to thefirst inner surface.
 10. The cutting tool cartridge of claim 8, whereinthe first inner surface corresponds to the first portion of the secondsurface of the shoulder and the second inner surface corresponds to thesecond portion of the second surface of the shoulder.
 11. A cutting toolcartridge, comprising: a main body including a cutting head having apocket configured to receive a cutting insert, wherein the pocketincludes a shoulder and a substantially planar surface, the shoulder andthe substantially planar surface cooperating to position the cuttinginsert relative to the cutting tool cartridge, wherein the cutting headincludes a concave surface extending away from the pocket, wherein theconcave surface is in facing relationship with the pocket and isconfigured to direct cutting chips away from the cutting tool cartridge.12. The cutting tool cartridge of claim 11, wherein the shoulderincludes a substantially planar first surface arranged perpendicular toa substantially planar second surface, the concave surface extendingfrom the first surface of the shoulder.
 13. The cutting tool cartridgeof claim 11, wherein the concave surface is arcuate in shape.